Arno Kamminga is making a splash at the 2024 Olympics -- but not for his swimming record ... it's more so for his junk coming through very clearly in his bathing suit.
The Dutch swimmer had Olympics viewers sweatin' when he showed up for one of his meets in a pair of seriously revealing swim trunks.
The bottoms had an almost flesh-colored look to them, especially when he exited the pool ... which left some viewers at home wondering if Arno was actually in the nude at the Olympic games in Paris.